Visual Perimeter measurement system and method

Adar Pelah (Inventor), Louise Elizabeth Allen (Inventor), Michael Edward Slater (Inventor), Andrew Robert Jackson (Inventor)

Research output: Patent


In one example of the invention a patient display is provided on which a fixation graphic or video is shown in substantially the centre of the display, and then target graphics or video are shown at different positions on the display about the centre. A test subject is positioned in front of the patient display a known distance therefrom, and a camera captures an image of the test subject's eyes, to allow gaze direction determination to be performed. The captured images are displayed to a clinician user by a controlling test application, the clinician making a determination based on the images as to whether the
test subject saw a target graphic or video when it was dis­ played. The clinician user then makes an appropriate input into the controlling test application, which also logs the posi­ tion at which the target image was displayed. By displaying target graphics at multiple locations onthe screen and logging
the clinician inputs, the controlling test application is able to build up a plot of the peripheral vision field of the test subject. This plot can then be graphically displayed to the clinician user, and stored with the test results for future clinical use.
Original languageEnglish
Patent numberUS Patent 2012/0154751
Publication statusPublished - 24 Aug 2009

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